I am planning to replace my front brake pads within a month. I was told that if my brake wear sensor trips, I will need to buy new sensors as they will get destroyed. So I am trying to save my brake wear sensors by replacing the front brake pads before the sensor actually trips. For that, I am looking for a very rough estimate on how many kilometers I can do before my front brakes wear out by 1mm (this is how much is left before sensor tripping). This is considering mix of city/highway non-aggressive, slow braker style driving.
The car make is a 14 ' Audi S4 (B8.5).